809M08050 Wiseco Piston .020 for Kawasaki JH1100 1100ZXi 1996-2003 80.50 mm

.020 Piston for Kawasaki JH1100 1100ZXi

This .020 oversize piston assembly for Kawasaki JH1100 1100ZXi watercraft is a Wiseco 809M08050 piston machined to an 80.50 mm bore, giving rebuilt engines a fresh, correctly sized top end.

Overview

This .020 piston for Kawasaki JH1100 1100ZXi models is a forged replacement piston intended for top end rebuilds on the 1100ZXi engine. The 80.50 mm .020 oversize piston restores proper bore clearance after cylinder work and helps bring compression back to spec. It suits riders rebuilding a tired jet ski engine or refreshing a top end as part of routine maintenance.

Built For Performance

• Forged piston construction for strength under high rpm jet ski use
• .020 oversize sizing at 80.50 mm bore for machined cylinders
• Manufacturer part number 809M08050 marked for easy identification
• Designed to match the 1100ZXi engine bore and stroke
• Suited to both stock rebuilds and mild performance builds

Fits These Machines

• for Kawasaki JH1100 1100ZXi, 1996-2003

On-The-Job Use

• Top end rebuilds on 1100ZXi jet skis
• Cylinder re-bore jobs requiring .020 oversize pistons
• Restoring lost compression on high hour engines
• Seasonal refresh before the riding season

Specs At A Glance

Good To Know

Q: Do I need to bore the cylinder for this piston? A: Yes, a .020 oversize piston requires the cylinder to be bored and honed to the matching 80.50 mm size for correct clearance.

Q: Should I replace all pistons at once? A: On a multi-cylinder 1100ZXi engine it is common practice to replace all pistons together so wear and compression stay even across cylinders.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.